[LU-5443] Remove references to defined constant HZ

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.7.0
• Affects Version/s: Lustre 2.7.0
• Assignee: Jian Yu
• Reporter: Jian Yu

Description

Replace the direct HZ access in Lustre codes with Linux kernel APIs:

jiffies_to_msecs()
jiffies_to_usecs()
jiffies_to_timespec()
msecs_to_jiffies()
usecs_to_jiffies()
timespec_to_jiffies()